submitted 11 months ago by Telcontar@lemmy.today to c/privacy@lemmy.ml

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Ok I have a question. I'm kinda a noob when it comes to privacy. I'll follow the guides and do the things to try to minimize ad companies selling my data etc.

Some basic stats: I have a Samsung running stock android. My GF has an iPhone. I use brave as my standard browser (I know that's not super popular but I haven't made the move to Firefox yet.) I have DNS level ad blocking on my router cause I hate ads with a passion. She uses safari.

So here's the deal. I was browsing the web looking for gift ideas for Christmas and came across some moccasins I liked. I mentioned to her that I liked them and browsed their website for a few minutes.

About 10 minutes after that, she's checking her Instagram and sees an ad for the exact brand of moccasin I just told her about. Just for kicks, she also checks her Facebook and sees the same ad there (makes sense cause it's the same company).

My question is basically how on earth did she get an ad for something I looked up? And how can we prevent that from happening? It's very very disconcerting to have ads pop up on others' phones right after looking that thing up.

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[-] akilou@sh.itjust.works 1 points 11 months ago

So what are the mechanics of this? OP would also have had to interact with Meta somehow after finding the moccasins but before the girlfriend did, right?

[-] sdoorex@slrpnk.net 13 points 11 months ago

No, you don’t have to interact with Meta. Websites that utilize Facebook ads in some fashion will install a Meta Pixel to their site in order to track users and better target their ads. That information can be correlated to others in the same household extremely easily.

You can read about the specifics of how Meta does it in their developer information here: https://developers.facebook.com/docs/meta-pixel/

this post was submitted on 13 Dec 2023

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Privacy

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